CN1308365A - Color CRT with convergence corrector - Google Patents
Color CRT with convergence corrector Download PDFInfo
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- CN1308365A CN1308365A CN00131860A CN00131860A CN1308365A CN 1308365 A CN1308365 A CN 1308365A CN 00131860 A CN00131860 A CN 00131860A CN 00131860 A CN00131860 A CN 00131860A CN 1308365 A CN1308365 A CN 1308365A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
- H01J29/76—Deflecting by magnetic fields only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
- H01J29/702—Convergence correction arrangements therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/56—Correction of beam optics
- H01J2229/568—Correction of beam optics using supplementary correction devices
- H01J2229/5681—Correction of beam optics using supplementary correction devices magnetic
- H01J2229/5682—Permanently magnetised materials, e.g. permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/56—Correction of beam optics
- H01J2229/568—Correction of beam optics using supplementary correction devices
- H01J2229/5681—Correction of beam optics using supplementary correction devices magnetic
- H01J2229/5687—Auxiliary coils
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Abstract
A color cathode ray tube using a self-convergence method is provided with magnets for correcting top/bottom pincushion distortion, and includes a vertical deflection coil and a four-pole coil. The vertical deflection coil generates a first correction field distorted in a barrel shape. The four-pole coil is arranged on the side of a deflection yoke nearer to an electron gun, and corrects YH barrel pattern misconvergence by generating a second correction field. The strength of the second correction field varies according to the amount of vertical deflection applied to electron beams emitted by the electron gun.
Description
The application is based on the 11-281322 number application of accepting in Japan, and its content is hereby incorporated by reference.
The present invention relates to a kind of color cathode ray tube that is used in the equipment such as television set, computer display, especially relate to a kind of device that is used in color cathode ray tube (hereinafter referred to as CRT) correct convergence, this device utilizes the distortion of magnet calibration grating.
Be used for that a kind of method of correct convergence is the auto-convergence method in using the color CRT of I-shaped electron gun.This method is proofreaied and correct the convergence of the barrel distortion of the pincushion distortion that comprises horizontal deflecting field and vertical deflection field.The auto-convergence method can produce the equipment of the simple structure and the fabulous ratio of performance to price, is therefore generally used.
In utilizing the conventional color CRT of auto-convergence method, for example have 90 ° of deflection angles and big screen curvature color CRT, therefore the barrel distortion of vertical deflection field experience cause the horizontal component (hereinafter referred to as " Bh ") of vertical deflection field to become big at the left and right edges place near CRT.Accompanying drawing 1A is a curve along the Bh of the trunnion axis H drafting of CRT.If the central point along the CRT horizontal direction is taken as initial point O, the line 1 that then shows Bh is about initial point O symmetry, and it leaves, and initial point O is far away more to be inclined upwardly more precipitously.
According to the Fleming law, along with Bh becomes big, the vertical deflection power that acts on the electron beam will increase.Therefore, in the color CRT that utilizes the auto-convergence method, the electron beam that more close vertical axis V passes through will be subjected to a more weak vertical deflection, and will be subjected to a stronger vertical deflection further from the electron beam that vertical axis V passes through.When using I-shaped electron gun, three electron beams corresponding to three primary colors (red, green and blue) are flatly arranged, so, if we ignore the situation that the central beam of three electron beams overlaps with vertical axis V, then in the vertical deflection power on the electron beam that acts on any side of vertical axis V, some variations will be arranged.Accompanying drawing 1B demonstrates vertical deflection power Fr, Fg and the Fb that is subjected to by red, green and blue electron beam R, G and B respectively.When before screen, watching, from left to right be aligned to the order of B, G and R by I-shaped electron gun electrons emitted Shu Tongchang.In this manual, suppose that all electron beams all are aligned to this order.When electron beam G overlapped with vertical axis V, in other words, when it was oriented to initial point O corresponding to trunnion axis H, vertical deflection power Fr and Fb equated, and vertical deflection power Fg is less than two vertical deflection power Fr and Fb.Yet, when electron beam R when initial point O is more farther than electron beam B, the vertical deflection power that electron beam is subjected to is Fb＜Fg＜Fr.On the contrary, when electron beam B when initial point O is more farther than electron beam R, the vertical deflection power that is subjected to is Fb＞Fg＞Fr.
As a result, when the fuchsin line of level is displayed on the top of screen and bottom edge, caused the misconvergence as shown in accompanying drawing 2.Here, in each the bar fuchsin line on display screen 2, red component R (solid line in the drawings) and blue component B (dotted line in the drawings) vertically disperse to the corner of screen.Because Bh is maximum when the vertical deflection amount reaches maximum, so this misconvergence is especially remarkable in the corner portions of screen.Be called as PQV pincushion misconvergence below such misconvergence.
The Japan Patent spy opens 8-98193 and discloses a kind of color CRT that passes through the barrel aberrance emendation PQV pincushion misconvergence of weakening vertical deflection field.Accompanying drawing 3A is the curve of the Bh value of drawing along trunnion axis H before the barrel distortion of vertical deflection field is weakened and afterwards.As the result who weakens barrel distortion, the line 1 that Bh changes from figure changes to line 3.Thereby, as shown in accompanying drawing 3B, reduced Bh, and proofreaied and correct PQV pincushion misconvergence along horizontal variation.
If vertical deflection field barrel distortion weakened, this can weaken CRT again and utilize the auto-convergence method to proofread and correct the ability of misconvergence.Here, if fuchsin line shown vertically along the center of display screen 2, with the misconvergence that produces as shown in Figure 4.Be called as YH pincushion misconvergence below this misconvergence.Disclosed color CRT utilizes a quadrupole coil to proofread and correct such misconvergence in correlation technique.Fig. 5 is a view of watching this quadrupole coil that obtains from screen front.Here, quadrupole coil 4 comprises coil 5 and 8 and U-shaped magnetic core 6 and 7.U-shaped magnetic core 6 and 7 is oppositely disposed in more close electron gun one side of deflecting coil, so that electron beam is by between two magnetic cores 6 and 7.When a vertical yoke current was passed through coil 5 and 8 after by diode rectification, power was applied on the left and right sides electrons emitted bundle B and R of electron gun, promotes them away from vertical axis V, had therefore proofreaied and correct YH pincushion misconvergence.
In recent years, the CRT with pure flat screen and large deflection angle degree has become more and more usual.In such CRT, for every bit on the screen surface, electron beam is moving all variations significantly of distance that arrive screen after electron gun emits.Cause the raster distortion that increases like this.For this raster distortion, it is to produce when being curved inwardly by the top of the grating region of electron beam scanning and bottom edge, is called as top/bottom pincushion distortion, and normally proofreaies and correct on the deflecting coil by magnet is installed to.Fig. 6 is the view of the deflecting coil of installing magnet seen from the display screen anterior aspect.Magnet 10 and 13 is installed in the top and the bottom of front surface of the Insulating frame of a deflecting coil 9, and horizontal deflection coil 12 is installed in the inner surface of Insulating frame 11.When the display screen front is watched, magnet 10 and 13 is arranged to: the arctic of magnet 10 on the right and South Pole on the left side, and the South Pole of magnet 13 is on the right and arctic on the left side.Fig. 7 demonstrates by magnet 10 and 13 magnetic flux that produce.If magnet 10 and 13 is arranged by this way, according to the Fleming law, act on the electron beam power F as shown in Figure 7, proofread and correct top/bottom pincushion distortion thus.
Yet, on point, die down away from magnet by the horizontal component Mh in magnet 10 and 13 magnetic fields that produce.Fig. 8 A is the curve along the Mh of trunnion axis H drafting.If the central point at trunnion axis H is taken as initial point O, the line 14 that shows component Mh is with respect to former point symmetry, can diminish when moving away from initial point along with it and more precipitous downward-sloping.Fig. 8 B demonstrates power Fr, Fg and the Fb that electron beam R, G and B are subjected to.When electron beam G overlapped with vertical axis V, in other words, when it was oriented to initial point O corresponding to trunnion axis H, vertical deflection power Fg and Fb equated, and vertical deflection power Fg is bigger than vertical deflection power Fr and Fb both.Yet, when electron beam R than electron beam B when initial point O is farther, the vertical deflection power that electron beam is subjected to is Fb＞Fg＞Fr.On the contrary, when electron beam B than electron beam R when initial point O is farther, the vertical deflection power that is subjected to is Fb＜Fg＜Fr.As a result, when the fuchsin line is flatly shown, caused misconvergence as shown in Figure 9.In such misconvergence, the red component R (solid line) of fuchsin line and blue component B (dotted line) disperse each other away from.This is called as the barrel-shaped misconvergence of PQV.
Although the field weakenings that produce by magnet 10 and 13 barrel distortion of vertical deflection field, this can cause YH pincushion misconvergence to worsen again.This misconvergence is so serious, and it has increased the red right figure misconvergence of PQH as the correction of the quadrupole coil in correlation technique to such an extent as to utilize.Figure 10 demonstrates the red right figure misconvergence of PQH.In such misconvergence, when two fuchsin lines when the left side of display screen and the right are shown vertically, as shown in FIG., the red component R (solid line) of fuchsin line turns to the right side and blue component (dotted line) turns to the left side.Components R and B tend to disperse significantly towards the corner of display screen.Can see that in the drawings D1 is that red component R and blue component B separate distance farthest, and the seriousness of the red right figure misconvergence of PQH can be represented with this distance D 1.
An object of the present invention is to provide a kind of in recent years, caught on, color CRT that the type of pure flat screen and large deflection angle degree is arranged, a kind of color CRT with excellent image quality especially is provided, this color CRT by utilizing magnet calibration grating zone the top and the pincushion distortion of bottom come correct convergence.
For achieving the above object, color CRT of the present invention has following structure.A kind of color cathode ray tube (CRT) uses the auto-convergence method, and it has the magnet that is used to proofread and correct top/bottom pincushion distortion, and comprises following parts.A frame deflector coil produces first alignment field of barrel distortion.A quadrupole coil is disposed in a side of the more close electron gun of a deflecting coil, and produces the barrel-shaped misconvergence of second alignment field correction YH.Here, the intensity of second alignment field changes according to acting on by the vertical deflection amount on the electron gun electrons emitted bundle.
If used said structure, the barrel-shaped misconvergence of PQV that is produced by magnet can be corrected.To the barrel-shaped misconvergence of YH, can proofread and correct with quadrupole coil by this then misconvergence by exaggerated correction for the YH pincushion misconvergence that can not proofread and correct in correlation technique.Simultaneously, the red right figure misconvergence of the PQH that produces when vertical deflection field barrel distortion also can be corrected.
In order to make the vertical deflection field distortion become barrel-shaped, can use down array structure.Frame deflector coil comprises first coiler part and second coiler part that is connected in series.Coil section in first coiler part has the coiling angle bigger than the coil section in second coiler part.First and second coiler parts are parallel-connected to first and second impedance components respectively, and by making the second impedor impedance greater than the first impedor impedance, first alignment field can distort into barrel-shaped.Perhaps, by making the number of turn in second coiler part more than the number of turn in first coiler part, first alignment field can distort into barrel-shaped.
In addition, quadrupole coil preferably has following structure.Three horizontal electron beams are launched by electron gun.Here, second alignment field may be produced by quadrupole coil, so that give inside horizontal force of electron beam effect of each outside of three horizontal electron beams.When the vertical deflection amount on affacting electron beam was maximum, the intensity that affacts second alignment field on the electron beam was maximum, and when the vertical deflection amount of electron beam experience was zero, its intensity was minimum value.And quadrupole coil may be connected on the frame deflector coil by external circuit.External circuit comprises a series circuit, wherein two resistor in series connect, two diodes each all have a negative electrode to be connected to any end of series circuit respectively, also have two rheostats at one end to be connected to one anode in two diodes separately respectively, be connected to an end of quadrupole coil at the other end.Here, the other end of quadrupole coil may be connected on the connected node of two resistors in series circuit, and series circuit may be connected in series on the frame deflector coil.In addition, quadrupole coil may comprise two coils that are connected in series.Each of these two coils all is wrapped in two U-shaped magnetic cores one.It is opposite that the U-shaped magnetic core is configured to corresponding end polarity, and electron beam is by between the opposed U-shaped magnetic core.
In addition, the VCR misconvergence that produces when the vertical deflection field distortion becomes barrel-shaped can be corrected by utilizing down array structure.CRT can comprise a comatic aberration correcting coil, and this coil is disposed in more close electron gun one side of deflecting coil, and is used to produce the 3rd alignment field and proofreaies and correct vertical comatic aberration residual (VCR) misconvergence.Here, the intensity of the 3rd alignment field may change according to affacting the vertical deflection amount on the electron beam.And the power that affacts on the electron beam by the 3rd alignment field may be applied on the direction identical with vertical deflection.The power that affacts on the external electron beam may be equal intensities, and it is bigger to affact the power that the force rate on the center electron beam affacts on the external electron beam.When the vertical deflection amount on affacting electron beam was maximum, the intensity that affacts the 3rd alignment field on the electron beam also was maximum, and when the vertical deflection amount of electron beam experience was zero, this intensity was minimum value.The comatic aberration correcting coil can comprise two coils that are connected in series, and is connected in series on the frame deflector coil.Each of two coils all is wrapped in two U shaped magnetic cores one.It is opposite that two U shaped magnetic cores are configured to corresponding end polarity, and electron beam is by between two relative U shaped magnetic cores.
In addition, can use structure as following.Color cathode ray tube (CRT) uses an auto-convergence method, and it has the magnet that is used to proofread and correct top/bottom pincushion distortion, and comprises following feature.Normal or ferromagnetic magnetisable material is disposed in one side of outer surface of the more close glass shell of frame deflector coil, so that make the vertical deflection field distortion become barrel-shaped.A quadrupole coil is disposed in one side of the more close electron gun of deflecting coil, so that proofread and correct the barrel-shaped misconvergence of YH by producing second alignment field.The intensity of second alignment field changes according to affacting by the vertical deflection amount on the electron gun electrons emitted bundle.Even use such structure, vertical deflection field still can distort into barrel-shaped, so misconvergence still can be corrected as stated above, as long as such structure comprises a quadrupole coil and a comatic aberration correcting coil.
From the following description of in conjunction with the accompanying drawings specific embodiment of the present invention being done, these and other purposes of the present invention, advantage and feature will become cheer and bright.In the accompanying drawings:
Fig. 1 is a curve chart, and it demonstrates vertical deflection field and is applied to power on the electron beam along the Strength Changes of the horizontal component of trunnion axis H and by horizontal component;
Fig. 2 demonstrates PQV pincushion misconvergence;
Fig. 3 is a curve chart, and it demonstrates before the barrel distortion of vertical deflection field is weakened and the weakened back of barrel distortion of variation of the horizontal component of vertical deflection field afterwards and vertical deflection field is applied to power on the electron beam by horizontal component;
Fig. 4 demonstrates YH pincushion misconvergence;
Fig. 5 is one and opens the view of the disclosed quadrupole coil of seeing previously from display screen among the 8-98193 the Japan Patent spy.
Fig. 6 is the view of a deflecting coil of seeing previously from display screen that magnet is installed;
Fig. 7 demonstrates the magnetic line of force that produced by magnet and is applied to power on the electron beam by the magnetic line of force;
Fig. 8 is a curve chart, and it demonstrates the magnetic field that produced by magnet and is applied to power on the electron beam along the Strength Changes of the horizontal component of trunnion axis H and by horizontal component;
Fig. 9 demonstrates the barrel-shaped misconvergence of PQV;
Figure 10 demonstrates the red right figure misconvergence of PQH;
Figure 11 is the profile of the monitor picture tube in the embodiments of the invention, and this is along comprising that the horizontal plane of developing tubular axis Z obtains;
Figure 12 is the vertical sectional view of the deflecting coil of the monitor picture tube in the embodiments of the invention, and this section comprises developing tubular axis Z;
Figure 13 is the view of the frame deflector coil from the embodiments of the invention that display screen is seen previously;
Figure 14 is the perspective view of the frame deflector coil in the embodiments of the invention;
Figure 15 is a circuit diagram, and it demonstrates a frame deflector coil 24, a comatic aberration correcting coil 19 and a quadrupole coil 18;
Figure 16 is the view of the comatic aberration correcting coil 19 seen previously from display screen;
Figure 17 is the view of the quadrupole coil 18 seen previously from display screen;
Figure 18 demonstrates the plane of being crossed over by trunnion axis H and vertical axis V;
Figure 19 demonstrates the magnetic flux by the magnetic field of the coil section generation of big coiling angle;
Figure 20 demonstrates the magnetic flux by the magnetic field of the coil section generation of little coiling angle;
Figure 21 demonstrates the barrel-shaped misconvergence of YH;
Figure 22 demonstrates the VCR misconvergence;
Figure 23 is the view of the comatic aberration correcting coil 48 that utilizes an E type magnetic core seen previously from display screen;
Figure 24 is the view of the deflecting coil in the monitor picture tube from the embodiments of the invention that display screen is seen previously;
Figure 25 is the vertical cross section that comprises the deflecting coil 55 of developing tubular axis Z; With
Figure 26 is the amplification view of first quartile in perpendicular to the cross section of the developing tubular axis Z of frame deflector coil.
The embodiments of the invention that describe below relate to one and have the deflection angles of 100 degree and 19 inches pure flat screen display monitors of the ratio of width to height of 4: 3.After this this equipment is called as " monitor ".First embodiment
Below in conjunction with accompanying drawing a monitor 15 among first embodiment of the present invention is described.The structure of monitor 15
Accompanying drawing 11 is profiles of the monitor 15 among this embodiment, and this section is to obtain on the horizontal plane that comprises developing tubular axis Z.In this figure, monitor 15 comprises 16, one deflecting coils 17 of a glass shell and an electron gun 20, and is useful on a quadrupole coil 18 and comatic aberration correcting coil 19 of proofreading and correct misconvergence.Can notice quadrupole coil 18 and comatic aberration correcting coil 19 shared same magnetic cores, as described later.
Deflecting coil 17
Figure 12 is the vertical cross section that comprises the deflecting coil 17 of developing tubular axis Z.Deflecting coil 17 comprises a horizontal deflection coil 21,22, one Insulating frames of magnet 23, a frame deflector coil 24 and a ferrite coil 25.Each magnet 22 is of a size of 40.0mm * 10.0mm * 5.0mm, and the surface magnetic flux metric density of 0.04T (tesla) is arranged.Magnet 22 is used to proofread and correct top/bottom pincushion distortion.
Frame deflector coil 24
Figure 13 is the view of the frame deflector coil 24 seen previously from display screen.Frame deflector coil 24 is divided into east and western coil E and W, and they are disposed in the both sides of vertical axis V, and these E and W coil each all form by inside and outside coil further.In other words, the E coil is formed by an outside E coil 26 and an inner E coil 27, and the W coil is formed by an outside W coil 29 and an inner W coil 28.Figure 14 is the perspective view of E coil.As shown in FIG., inside and outside E coil 26 and 27 separately terminal leaded 30 and 31, and 32 and 33.Electric current provides by these lead-in wires 30-33.Figure 15 is the circuit diagram of a frame deflector coil 24, comatic aberration correcting coil 19 and quadrupole coil 18.Each E of frame deflector coil and the total number of turns of W coil are 98, form these coils inside and outside coil 26 to 29 each 49 circles are all arranged.Damped resistor is connected in parallel on each of these inside and outside coils 26 to 29.Be connected in parallel on Inside coil 27 and 28 damped resistor each the resistance of 100 Ω is all arranged, and be connected in parallel on external coil 26 and 29 damped resistor each the resistance of 4 Ω is all arranged.Here, frame deflector coil 24 is connected in series to comatic aberration correcting coil 19, and also is connected in series on the quadrupole coil 18 by external circuit 34.
Comatic aberration correcting coil 19
Figure 16 is the view of the comatic aberration correcting coil 19 seen previously from display screen.Comatic aberration correcting coil 19 is wrapped on pair of U-shaped magnetic core 41 and 42, Yi Bian U-shaped magnetic core 41 and 42 is in the top and the bottom that are oppositely disposed in deflecting coil 17 near electron gun 20.Comatic aberration correcting coil 19 is wrapped in 93 circles on each U-shaped magnetic core 41 and 42.And comatic aberration correcting coil 19 is connected to: U-shaped magnetic core 41 has identical polarity usually with 42 each corresponding end.
Quadrupole coil 18
As shown in figure 15, quadrupole coil 18 is connected on the frame deflector coil 24 by external circuit 34.External coil 34 comprises the series circuit with two resistors 35 and 36, and the negative electrode of Schottky diode 37 and 40 is connected to each end of series circuit respectively.Each variable resistance 38 and an end of 39 are connected on the anode of diode 37 and 40 respectively, and the other end is connected on the intermediate connection point of resistor 35 and 36 by quadrupole coil 18.Here, resistor 35 and 36 has identical resistance.
Figure 17 is the view of the quadrupole coil 18 seen previously from display screen.Quadrupole coil 18 as comatic aberration correcting coil 19, is wrapped on U-shaped magnetic core 41 and 42, and the number of turn all is 70 under each situation.Electric current flows through quadrupole coil 18 with identical direction usually, because carried out rectification by diode 37 and 40.The common like this quadrupole coil 18 of causing produces a picture in the magnetic field shown in Figure 17, thus with horizontal force with correlation technique in affact (that is an inside rather than outside power) on each electron beam B and the R in the rightabout of the quadrupole coil 4 described.
The coiling angle
Cross over the given plane that forms by trunnion axis H and vertical axis V and be divided into four quadrants.At trunnion axis with connect the coiling angle that the angle that forms between the line of initial point O each point on the winding (coil) in the first quartile on this plane is called as frame deflector coil 24.Corresponding to a zone of given coiling angle is exactly a coil section by this coiling angle decision in the first quartile, and second to the four-quadrant in each with the coil section of coil section symmetry in first quartile.Figure 18 demonstrates a plane of being crossed over by trunnion axis H and vertical axis V.The coiling angle of coil section 43 to 46 is given and to be an angle θ in Figure 18, and it is to form between the straight line 47 of initial point O and (2) trunnion axis H at (1) coil section 43 that is connected in the first quartile.In this figure, symbol ' ' give coil section 43 and 44, the expression electric current is crossed these cross sections from screen flow on the direction of electron gun 20, and symbol ' ⊙ ' gives coil section 45 and 46, the expression electric current in the opposite direction promptly the direction from electron gun 20 to screen flow through these cross sections.Usually, electric current flows through the coil in first and second quadrants that are disposed in frame deflector coil in one direction, and flows through the coil that is disposed in third and fourth quadrant with opposite direction.
Figure 19 demonstrates the magnetic flux in the magnetic field that is produced by the coil section of big coiling angle (in other words be exactly externally the coil section in the coil 26 and 29).As shown in FIG., the distortion of field that is produced by the coil section of big coiling angle becomes pincushion.Simultaneously, Figure 20 demonstrates the magnetic flux in the magnetic field that is produced by the coil section (in other words being exactly the coil section in Inside coil 27 and 28) of little coiling angle.As shown in FIG., the distortion of field that is produced by the coil section of little coiling angle becomes barrel-shaped.For the purpose of accurately, the coil section with 60 degree or bigger coiling angle will produce the magnetic field of a pincushion distortion, and the coil section with coiling angle littler than this angle will produce the magnetic field of a barrel distortion.
The correction of the barrel-shaped misconvergence of PQV
In the display monitor 15 of present embodiment, be parallel-connected to Inside coil 27 and 28 damped resistor each the resistance of 100 Ω is all arranged, and be parallel-connected to external coil 26 and 29 damped resistor each the resistance of 4 Ω is all arranged.As a result, the magnetic fields ratio that is produced by Inside coil 27 and 28 is stronger by external coil 26 and 29 magnetic fields that produce.In other words, the magnetic field that is produced by the coil section of little coiling angle is stronger than the magnetic field that the coil section by big coiling angle produces.Because the distortion of field that is produced by the coil section of little coiling angle becomes barrel-shaped, finally like this mean that the barrel distortion of the vertical deflection field that is produced by frame deflector coil 24 is stronger.As a result, the difference that affacts power Fb, Fg on the electron beam and Fr increases, and as shown in Figure 1, thereby has proofreaied and correct the barrel-shaped misconvergence of PQV.
Yet if the barrel distortion of vertical deflection field is enhanced like this, YH pincushion misconvergence will be exceeded the proper limits in righting a wrong, and produces the barrel-shaped misconvergence of YH, the red right figure misconvergence of PQH and VCR misconvergence.The red right figure misconvergence of barrel-shaped misconvergence of YH and PQH is corrected by quadrupole coil 18, and the VCR misconvergence is corrected by comatic aberration correcting coil 19.This process will be described below.
The correction of the barrel-shaped misconvergence of YH
If the barrel distortion of vertical deflection field strengthens in a manner described, will produce the barrel-shaped misconvergence of YH.Figure 21 demonstrates the barrel-shaped misconvergence of YH.When the fuchsin line was presented at the trunnion axis center vertically, the influence of the barrel distortion of vertical deflection field had caused that the red component R of fuchsin line and blue component B diffuse to the left side and the right, they near the top of screen and bottom away from trunnion axis H.In the utmost point top and the utmost point bottom of screen, components R and B are separated by a distance D 2 that approximates 0.6mm greatly.The degree of this misconvergence can be corrected by quadrupole coil 18.As shown in figure 17, on each electron beam R and B, this power and vertical deflection are synchronous with an inside horizontal force action in the magnetic field that is produced by quadrupole coil 18.Yet, to there not being any influence on the electron beam G.As a result, electron beam R and B are subjected to a stronger inside power when the vertical deflection angle is bigger.This means that red component R and blue component B will move on to together, thereby eliminate the barrel-shaped misconvergence of YH.
The correction of the red right figure misconvergence of PQH
The red right figure misconvergence of PQH that produces owing to the strong barrel distortion of vertical deflection field also can utilize quadrupole coil 18 to be corrected.In the present embodiment, before being proofreaied and correct by quadrupole coil 18, the size of the red right figure misconvergence of PQH is a distance D 1 as shown in Figure 10, approximately is 1.1mm here.Quadrupole coil 18 in the color CRT of present embodiment on the display screen left side and the right than can proofread and correct the YH misconvergence (red and blue component dispersing) that about twice is Duoed at the display screen center with respect to horizontal direction.As a result, distance D 1 approximately is the twice of distance D 2 sizes, thereby barrel-shaped misconvergence of YH and the red right figure misconvergence of PQH are side by side proofreaied and correct by quadrupole coil 18.
The VCR misconvergence
The VCR misconvergence utilizes comatic aberration correcting coil 19 to be corrected.Figure 22 demonstrates the VCR misconvergence.When white line when display top and bottom are flatly shown, red and blue component R and B are complementary, but green component G disperses with respect to other two components.This misconvergence is called as the VCR misconvergence, and wherein redness and blue component R and B are shown in the outside of green component G.The closer to the top and the bottom of display screen, the VCR misconvergence is remarkable more, and is sightless at the core of screen.Comatic aberration correcting coil 19 produces a pincushion distortion field, as shown in Figure 18, thereby proofreaies and correct the VCR misconvergence.In other words, because the field distortion that is produced by comatic aberration correcting coil 19 becomes pincushion, according to the Fleming law, electron beam G is subjected to a power maximum in the direction that is parallel to the vertical deflection direction.Electron beam R and B also are subjected to being parallel to equally the power of vertical deflection direction, but the power that this force rate is applied on the electron beam G is little.And, because receiving a vertical yoke current, comatic aberration correcting coil 19 is used to produce a magnetic field, so the difference that is applied to the power on electron beam R and the B and is applied between the power on the electron beam G when the vertical deflection angle is bigger is bigger, and, on the contrary, more hour difference is littler when the vertical deflection angle.Comatic aberration correcting coil 19 is proofreaied and correct the VCR misconvergence like this.
The damped resistor that is used to form each inside and outside coil of frame deflector coil by adjustment strengthens the barrel distortion of vertical deflection field, and further use the effect that produces by quadrupole coil 18 and comatic aberration correcting coil 19 to make up with it, can make the misconvergence that in the color CRT of large deflection angle degree and pure flat screen, produces, particularly the misconvergence that is produced by magnet in such color CRT obtains proofreading and correct.
As previously described, to such an extent as to the YH pincushion misconvergence that the magnetic field that is produced by magnet causes too serious can not proofread and correct by quadrupole coil 18.Yet if the barrel distortion of vertical deflection field is increased, thereby with misconvergence change the becoming barrel-shaped misconvergence of YH, misconvergence can be lowered to the degree of proofreading and correct with quadrupole coil 18.This means that final, any type of misconvergence can both be corrected by the equipment of describing in this manual.
If use the comatic aberration correcting coil of E shape magnetic core rather than U-shaped magnetic core, also can reach for above-described those similar actions.Figure 23 is the view of the comatic aberration correcting coil 48 of the use E shape magnetic core seen previously from display screen.In this figure, comatic aberration correcting coil 48 comprises a pair of E shape magnetic core 53 and 54 and be wrapped in coil 49 to 52 on E shape magnetic core 53 and 54.Comatic aberration correcting coil 48 is disposed in one side of the more close electron gun 20 of deflecting coil 17.Comatic aberration correcting coil 48 produces one and is similar to the pincushion field that is produced by comatic aberration correcting coil 19, thereby proofreaies and correct the VCR misconvergence.
One is used the quadrupole coil of E shape magnetic core can reach above-described those similar effects.In addition, quadrupole coil also can shared identical E type magnetic core with the comatic aberration correcting coil.
Second embodiment
In first embodiment, strengthened the barrel distortion of vertical deflection field for the adjustment of each inside and outside damped resistor of frame deflector coil.Yet in second embodiment, the barrel distortion of vertical deflection field is enhanced by a permalloy is installed on deflecting coil.
In second embodiment, except the structure of frame deflector coil with add the permalloy, monitor configuration is the same with monitor in first embodiment.In first embodiment, frame deflector coil is divided into outside and Inside coil, but in second embodiment, it is only formed by two coils: an eastern coil E and a western coil W.The size of permalloy is 5.0mm * 25.0mm, and is installed in the inner surface of deflecting coil, and the installation site is between the 15.0mm-20.0mm of electron gun one side of datum line.
Figure 24 is the view of seeing previously from display screen of deflecting coil 55 the monitor of second embodiment.Deflecting coil 55 has the magnet 56 of the last lower limb that is installed in Insulating frame 58, and permalloy 59 be installed in Insulating frame 58 by on the perforate exposed portions that is formed in the horizontal deflection coil 57.Figure 25 is the vertical cross-section that comprises the deflecting coil 55 of developing tubular axis Z.Permalloy 59 is installed on the surface of Insulating frame 58, at datum line 60 on one side near electron gun, and apart from the position of datum line 60 between 15.0mm-20.0mm.Datum line 60 is perpendicular to developing tubular axis Z, and is a straight line that comprises deflection center.The barrel distortion of vertical deflection field is strengthened by permalloy 59, and misconvergence is corrected according to the mode similar to first embodiment.
Should be pointed out that 59 needs of permalloy are arranged to the outer surface than the more close glass shell of frame deflector coil, and can for example be disposed between Insulating frame and the frame deflector coil.In addition, the magnetic material except permalloy also can be used to reach above-mentioned effect, as long as it has normal or strong magnetic.
The present invention is described with reference to the foregoing description, but is not limited to structure described herein.Also can adopt following improvement structure.Improve structure
The barrel distortion of vertical deflection field can distribute by the winding of adjusting frame deflector coil and be enhanced.In other words, if the coil section of the angle that winds the line greatly has the coil section number of turn still less than little coiling angle, then the barrel distortion of vertical deflection field can be enhanced.
Figure 26 is at the enlarged diagram perpendicular to the first quartile in the cross section on the plane of the developing tubular axis Z of frame deflector coil.The coil section 61 of frame deflector coil is at the camber line 62 that the 24.0mm radius is arranged from initial point O and has from an O ' the zone between the camber line 63 of 19.0mm radius, and some O ' is by determining from initial point O along vertical axis V at the 3mm that moves up of pros.There is the part (dash area among the figure) of the coil section 61 of 30 ° or littler coiling angle to widen significantly.The number of turn that is wrapped on the frame deflector coil adds up to 98, and the width of these numbers of turn and cross section 61 is distributed pro rata.The shape of second, third of frame deflector coil and four-quadrant existence and first quartile symmetry.
Implement like this if winding distributes, the number of turn is increased in the zone that little coiling angle is arranged, thereby has strengthened the barrel distortion of vertical deflection field.As a result, if having the quadrupole coil of above-mentioned characteristic and comatic aberration correcting coil to be used together, just can obtain effect of the present invention.
In addition, embodiment describes with reference to 19 inches monitors of the pure flat screen that 100 ° of deflection angles, 4: 3 the ratio of width to height are arranged, but the monitor that different screen size, deflection angle, the ratio of width to height or screen curvature are arranged also can utilize structure of the present invention to be corrected, as long as the misconvergence that is suffered by such monitor is owing to magnet.
Although with way of example the present invention has been carried out comprehensive description with reference to accompanying drawing, also be appreciated that various changes and improvements also will be tangible to those skilled in the art.Therefore, unless these changes and improvements have broken away from scope of the present invention, otherwise they should be regarded as being included in the present invention.
Claims (16)
1. color cathode ray tube (CRT) that uses the auto-convergence method and have the magnet that is used to proofread and correct top/bottom pincushion distortion, this CRT comprises:
The frame deflector coil of first alignment field that is used to produce barrel distortion and
A quadrupole coil, it is disposed in one side of the more close electron gun of deflecting coil, is used to produce second alignment field and proofreaies and correct YH barrel distortion, and the intensity of second alignment field changes according to acting on by the vertical deflection amount on the electron gun electrons emitted bundle.
2. according to the CRT of claims 1, wherein:
Frame deflector coil comprises first coiler part and second coiler part that is connected in series, and the coiling angle of the coil section of first coiler part is greater than the coiling angle of the coil section in second coiler part,
First and second coiler parts are parallel-connected to first and second impedance components separately, and by making the second impedor impedance greater than the first impedor impedance, first alignment field distorts into barrel-shaped.
3. according to the CRT of claims 1, wherein:
Frame deflector coil comprises first coiler part and second coiler part that is connected in series, and the coiling angle of the coil section of first coiler part is greater than the coiling angle of the coil section in second coiler part, and
By making the number of turn in second coiler part more than the number of turn in first coiler part, first alignment field distorts into barrel-shaped.
4. according to the CRT of claims 1, wherein:
Three horizontal electron beams are launched by electron gun,
Second alignment field is produced by a quadrupole coil, so that give inside horizontal force of each external electron beam effect of three horizontal electron beams,
When the vertical deflection amount on affacting electron beam reached maximum, the intensity that affacts second alignment field on the electron beam reached maximum, and when the vertical deflection amount of electron beam experience was zero, this intensity reached minimum value.
5. according to the CRT of claims 4, wherein:
Quadrupole coil is connected to frame deflector coil by external circuit, external circuit comprises (1) series circuit, wherein two resistor in series connect, (2) two diodes, each all has a negative electrode to be connected to arbitrary end of series circuit respectively, (3) two variable resistances, each at one end is connected to respectively on one the anode in two diodes, be connected at the other end on the end of quadrupole coil, the other end of quadrupole coil is connected on the connected node of two resistors in series circuit, and series circuit is connected in series on the frame deflector coil.
6. according to the CRT of claims 5, wherein:
Quadrupole coil comprises two coils that are connected in series,
Each of two coils all is wrapped in two U-shaped magnetic cores one,
It is opposite that the U-shaped magnetic core is configured to corresponding end polarity,
Electron beam is by in the middle of the opposed U-shaped magnetic core.
7. according to the CRT of claims 1, also comprise a comatic aberration correcting coil, it is disposed in one side of the more close electron gun of deflecting coil, and be used to produce the 3rd alignment field and proofread and correct vertical comatic aberration residual (VCR) misconvergence,
Wherein the intensity of the 3rd alignment field changes according to acting on the vertical deflection amount on the electron beam.
8. according to the CRT of claims 7, wherein:
The masterpiece that acts on the electron beam by the 3rd alignment field is used on the direction identical with vertical deflection,
The power that acts on the external electron beam is equicohesive, and it is bigger to act on the power that the force rate on the center electron beam acts on the external electron beam, and
When the vertical deflection amount on acting on electron beam reached maximum, the intensity that acts on the 3rd deflection field on the electron beam reached maximum, and when the vertical deflection amount of electron beam experience was zero, this intensity reached minimum value.
9. according to the CRT of claims 8, wherein, the comatic aberration correcting coil comprises two coils that are connected in series, and is connected in series on the frame deflector coil,
Each of two coils all is wrapped on of two U-shaped magnetic cores,
It is opposite that two U-shaped magnetic cores are configured to corresponding end polarity, and
Electron beam is by between two opposed U-shaped magnetic cores.
10. color cathode ray tube (CRT) that uses the auto-convergence method and have the magnet that is used to proofread and correct top/bottom pincushion distortion, this CRT comprises:
A magnetisable material, it is a kind of in common magnetisable material and the ferromagnetic substance, is disposed in one side of the more close glass shell outer surface of frame deflector coil, so that make the vertical deflection field distortion become barrel-shaped; With
A quadrupole coil, it is disposed in one side of the more close electron gun of deflecting coil, is used for proofreading and correct YH barrel distortion by producing second alignment field, and the intensity of second alignment field changes according to acting on by the vertical deflection amount on the electron gun electrons emitted bundle.
11. according to the CRT of claims 10, wherein, three horizontal electron beams are launched by electron gun,
Second alignment field is produced by the level Four coil, so that on each external electron beam of three horizontal electron beams, act on an inside horizontal force,
When the vertical deflection amount on acting on electron beam was maximum, the intensity that acts on second alignment field on the electron beam reached maximum, and when the vertical deflection amount of electron beam experience was zero, this intensity reached minimum value.
12. CRT according to claim 11, wherein, quadrupole coil is connected on the frame deflector coil by external circuit, and external circuit comprises (1) series circuit, and wherein two resistor polyphones connect, (2) two diodes, each all has a negative electrode to be connected to arbitrary end and (3) two variable resistances of series circuit respectively, and each at one end is connected respectively on one the anode in two diodes, be connected to an end of quadrupole coil at the other end
The other end of quadrupole coil is connected on the connected node of two resistors in series circuit, and series circuit is connected in series on the frame deflector coil.
13. according to the CRT of claims 12, wherein, quadrupole coil comprises two coils that are connected in series, each of two coils all is wrapped in two U-shaped magnetic cores one,
It is opposite that the U-shaped magnetic core is configured to corresponding end polarity,
Electron beam is by in the middle of the opposed U-shaped magnetic core.
14. according to the CRT of claims 10, also comprise a comatic aberration correcting coil, it is disposed in one side of the more close electron gun of deflecting coil, and be used to produce the 3rd alignment field and proofread and correct vertical comatic aberration residual (VCR) misconvergence,
Wherein the intensity of the 3rd alignment field changes according to acting on the vertical deflection amount on the electron beam.
15. according to the CRT of claims 14, wherein, the masterpiece that acts on the electron beam by the 3rd alignment field is used on the direction identical with vertical deflection,
The power that acts on the external electron beam is equicohesive, and it is bigger to act on the power that the force rate on the center electron beam acts on the external electron beam, and
When the vertical deflection amount on acting on electron beam reached maximum, the intensity that acts on the 3rd deflection field on the electron beam reached maximum, and when the vertical deflection amount of electron beam experience was zero, this intensity reached minimum value.
16. according to the CRT of claims 15, wherein, the comatic aberration correcting coil comprises two coils that are connected in series, and is connected in series on the frame deflector coil,
Each of two coils all is wrapped on of two U-shaped magnetic cores,
It is opposite that two U-shaped magnetic cores are configured to corresponding end polarity, and
Electron beam is by between two opposed U-shaped coils.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28132299A JP2001101983A (en) | 1999-10-01 | 1999-10-01 | Color picture tube device |
| JP281322/1999 | 1999-10-01 | ||
| JP281322/99 | 1999-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1308365A true CN1308365A (en) | 2001-08-15 |
| CN100375215C CN100375215C (en) | 2008-03-12 |
Family
ID=17637501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001318608A Expired - Fee Related CN100375215C (en) | 1999-10-01 | 2000-09-30 | Color CRT with convergence corrector |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6573668B1 (en) |
| EP (1) | EP1089312B1 (en) |
| JP (1) | JP2001101983A (en) |
| KR (1) | KR100703506B1 (en) |
| CN (1) | CN100375215C (en) |
| DE (1) | DE60031626T2 (en) |
| TW (1) | TW494430B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963033A (en) * | 2019-12-06 | 2020-04-07 | 东南大学 | Unmanned aerial vehicle hovering mechanism and hovering adsorption method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6759815B2 (en) * | 2001-09-03 | 2004-07-06 | Matsushita Electric Industrial Co., Ltd. | Color picture tube device in which YH misconvergence is corrected |
| US20040032198A1 (en) * | 2002-06-14 | 2004-02-19 | Hiroshi Sakurai | Color picture tube device |
| JP2004363047A (en) | 2003-06-06 | 2004-12-24 | Toshiba Corp | Deflection yoke device and television receiving set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5475215A (en) * | 1977-11-29 | 1979-06-15 | Toshiba Corp | Deflecting unit |
| US4433268A (en) * | 1980-08-19 | 1984-02-21 | Tokyo Shibaura Denki Kabushiki Kaisha | Deflection yoke for a color cathode ray tube |
| US4823100A (en) * | 1985-07-31 | 1989-04-18 | Rca Licensing Corporation | Deflection distortion correction device |
| NL8503544A (en) * | 1985-12-23 | 1987-07-16 | Philips Nv | IMAGE DISPLAY SYSTEM WITH AN IN-LINE COLOR IMAGE TUBE. |
| JPH0670895B2 (en) * | 1986-10-31 | 1994-09-07 | 株式会社東芝 | Color picture tube |
| CA1311793C (en) * | 1987-08-28 | 1992-12-22 | Rca Licensing Corporation | Video apparatus having self-converging pattern-corrected deflection yoke |
| DE68928125T2 (en) * | 1989-10-31 | 1997-10-16 | Thomson Tubes & Displays | Display device with a color picture tube |
| US5327051A (en) * | 1990-07-19 | 1994-07-05 | Rca Thomson Licensing Corporation | Deflection system with a pair of quadrupole arrangements |
| US5041764A (en) * | 1990-10-22 | 1991-08-20 | Zenith Electronics Corporation | Horizontal misconvergence correction system for color video display |
| KR930000223Y1 (en) * | 1990-10-24 | 1993-01-18 | 삼성전관주식회사 | Magnet structure for convergence calribration |
| DE69311298T2 (en) * | 1993-02-18 | 1997-10-09 | Thomson Tubes & Displays | Deflection yoke with a pair of magnets near its minor axis |
| JP3358283B2 (en) * | 1994-02-25 | 2002-12-16 | 日本ビクター株式会社 | Deflection yoke |
| JPH0898193A (en) * | 1994-09-22 | 1996-04-12 | Matsushita Electron Corp | Color picture tube device |
| US5847503A (en) * | 1994-09-24 | 1998-12-08 | Thomson Tubes & Displays S.A. | Electron beam deflection device for cathode ray tubes which is self convergent and geometry corrected |
| JP3307527B2 (en) | 1995-09-29 | 2002-07-24 | シャープ株式会社 | PPM demodulator |
| JPH09115462A (en) * | 1995-10-18 | 1997-05-02 | Sony Corp | Deflecting yoke |
| US5777429A (en) * | 1996-02-22 | 1998-07-07 | Sony Corporation | Device for correction of negative differential coma error in cathode ray tubes |
| US5747924A (en) * | 1996-07-23 | 1998-05-05 | Sony Corporation | Picture distortion correcting apparatus |
| JP3489963B2 (en) * | 1997-04-25 | 2004-01-26 | 松下電器産業株式会社 | Color picture tube equipment |
| TW480525B (en) * | 1999-12-22 | 2002-03-21 | Matsushita Electronics Corp | Color display tube device |
-
1999
- 1999-10-01 JP JP28132299A patent/JP2001101983A/en active Pending
-
2000
- 2000-09-25 US US09/669,175 patent/US6573668B1/en not_active Expired - Fee Related
- 2000-09-29 EP EP00308626A patent/EP1089312B1/en not_active Expired - Lifetime
- 2000-09-29 DE DE60031626T patent/DE60031626T2/en not_active Expired - Fee Related
- 2000-09-29 TW TW089120269A patent/TW494430B/en not_active IP Right Cessation
- 2000-09-30 KR KR1020000057603A patent/KR100703506B1/en not_active IP Right Cessation
- 2000-09-30 CN CNB001318608A patent/CN100375215C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963033A (en) * | 2019-12-06 | 2020-04-07 | 东南大学 | Unmanned aerial vehicle hovering mechanism and hovering adsorption method |
| CN110963033B (en) * | 2019-12-06 | 2022-03-11 | 东南大学 | Unmanned aerial vehicle hovering mechanism and hovering adsorption method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1089312A3 (en) | 2003-04-02 |
| US6573668B1 (en) | 2003-06-03 |
| EP1089312B1 (en) | 2006-11-02 |
| KR20010039960A (en) | 2001-05-15 |
| TW494430B (en) | 2002-07-11 |
| EP1089312A2 (en) | 2001-04-04 |
| JP2001101983A (en) | 2001-04-13 |
| CN100375215C (en) | 2008-03-12 |
| DE60031626T2 (en) | 2007-09-20 |
| KR100703506B1 (en) | 2007-04-03 |
| DE60031626D1 (en) | 2006-12-14 |
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